The AquaDome Title update for Rocket League has 7 achievements.
Make 535 Shots on Goal
Freeze an opponent's shot before it can score
Equip the Bubbles Rocket Trail and Score an Aerial goal, while playing in AquaDome
Head to AquaDome and score a goal while flipped on your back
Activate every power-up in Rocket League Rumble
Score a Goal, Save a shot, and Assist a teammate in a single game
Win the MVP award in a game that goes to overtime